4.5-42V Wide Vin, Current Mode Dual Synchronous Buck Controller
Product details
Parameters
Package | Pins | Size
Features
- Emulated Peak Current Mode Control
- Wide Operating Range (4.5 V to 42 V)
- Easily Configurable for Dual Outputs or Interleaved Single Output
- Robust 3.3-A Peak Gate Drive
- Switching Frequency Programmable to 750 kHz
- Optional Diode Emulation Mode
- Programmable Output From 0.8 V
- Precision 1.5% Voltage Reference
- Programmable Current Limit
- Hiccup Mode Overload Protection
- Programmable Soft-Start
- Programmable Line Undervoltage Lockout
- Automatic Switchover to External Bias Supply
- Channel2 Enable Logic Input
- Thermal Shutdown
- Leadless 32-Pin WQFN Package
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Description
The LM25119 device is a dual synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control using an emulated current ramp. Current mode control provides inherent line feedforward, cycle-by-cycle current limiting and ease-of-loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The switching frequency is programmable from 50 kHz to 750 kHz. The LM25119 device drives external high-side and low-side N-channel MOS power switches with adaptive dead-time control. A user-selectable diode emulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator with automatic switch-over to external bias further improves efficiency. Additional features include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line undervoltage lockout. The device is available in a power enhanced leadless 32-pin WQFN package featuring an exposed die attach pad to aid thermal dissipation.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The LM25119EVAL evaluation board provides the design engineer with a fully functional dual output buck converter, employing the LM25119 Dual Emulated Current Mode Synchronous Buck Controller. The evaluation board is designed to provide both 3.3V and 1.8V outputs over an input range of 6.0V to 36V (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
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download PMP10664 BOM.pdf (98KB) -
download PMP10664 Assembly Drawing.pdf (85KB) -
download PMP10664 PCB.pdf (704KB) -
download PMP10664 CAD Files.zip (420KB) -
download PMP10664 Gerber.zip (243KB)
Design files
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download PMP20021 BOM.pdf (41KB) -
download PMP20021 Assembly Drawing.pdf (105KB) -
download PMP20021 PCB.pdf (163KB) -
download PMP20021 CAD Files.zip (142KB) -
download PMP20021 Gerber.zip (173KB)
Design files
-
download PMP7177 BOM.pdf (94KB) -
download PMP7177 Gerber.zip (84KB)
Design files
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download TIDA-00630 BOM.pdf (231KB) -
download TIDA-00630 Assembly Drawing.pdf (737KB) -
download TIDA-00630 PCB.pdf (4256KB) -
download TIDA-00630 Gerber.zip (971KB)
Design files
-
download PMP9700 BOM.pdf (34KB) -
download PMP9700 Gerber.zip (190KB)
Design files
-
download PMP7877 BOM .pdf (118KB) -
download PMP7877 BOM.pdf (233KB) -
download PMP7877 Gerber.zip (1244KB)
Design files
-
download PMP7876 BOM.pdf (19KB)
Design files
-
download PMP7428 BOM.pdf (26KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
WQFN (RTV) | 32 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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